<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>初始化 state - 紫霞仙子</title>
</head>
<body>
    <div id="root"> </div>

    <script src="../js/react.development.js"></script>
    <script src="../js/react-dom.development.js"></script>
    <script src="../js/babel.min.js"></script>

    <script type="text/babel">
        // let data = {
        //     isNight: false
        // }

        class App extends React.Component{
            //为实例对象添加 state 属性
            //方式一
            // constructor(){
            //     //这里的super必须要添加
            //     super();

            //     this.state = {
            //         isNight: false
            //     };
            // }

            //方式二
            state = {
                isNight: false
            }

            render(){
                //获取到 state 对象
                // console.log(this.state);
                return <h2>至尊宝, 我是 {this.state.isNight ? '青霞' : '紫霞'} 仙子</h2>
            }
        }

        ReactDOM.render(<App />, document.querySelector('#root'));
    </script>
</body>
</html>